Monitoring your domain

Unlike other email services which report to Buttondown when a newsletter is flagged as spam (via the CFBL mechanism), Gmail does not.

If you're concerned about your domain's reputation (or even if you are not), you should sign up for Google Postmaster Tools, a free service from Google that will provide high-level visibility into your domain's reputation.

If you're less concerned about high-level, long-term reputation and more concerned about understanding why a single email being sent from your domain is being flagged, two additional useful tools:

• Postmark's spam score checker
• About My Email